Display rack



FIG. 1 is a perspective view of a display rack showing my new design;

FIG. 2 is a front elevational view thereof, the rear being identical in appearance;

FIG. 3 is a right side elevational view thereof, the left side being identical in appearance;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a display rack, as shown and described. 